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ICSE Class 10 Answered

Explain cell cycle.
Asked by machariya | 10 Apr, 2019, 01:50: PM
answered-by-expert Expert Answer

The sequence of events by which a cell duplicates its genome and synthesises all other cell contents and eventually divides into two daughter cells is called the cell cycle.

A typical eukaryotic somatic cell has two main stages—a long undividing state called the interphase also known as the intermitosis or I phase and a shorter phase of nuclear division called the mitotic or M phase.

Various phases of the cell cycle are regulated by proteins, cyclins and cyclin-dependent protein kinases (CDKs). · The CDKs phosphorylate proteins using ATP resulting in the breakdown of nuclear membrane. · Two regulatory mechanisms called check points are carried out by these CDKs. The first check point lies between the G1 and S phases and the second check point lies between the G2 and M phases. · The check points take decisions about the progress of cell division.

Answered by Sheetal Kolte | 10 Apr, 2019, 05:16: PM

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